A nearly 8-minute gauntlet with 3 difficulties so most folks can jam out to this song which is (quite literally) a banger.

カラカラカラのカラ
Romanized: Kara Kara Kara no Kara
In English: Emptiness, Emptiness, Emptiness of Emptiness
Artist/Writer: Kikuo
Vocals: Hatsune Miku
Illustrator: si_ku

Difficulties and Style:
Extreme - 10 - Mixed
Hard - 8 - Arcade
Normal - 6 - Arcade

Charter:
JoldNoteC

Sources:
Video: https://www.youtube.com/watch?v=hL75gQUcu0A - Kikuo - Kara Kara Kara no Kara (Emptiness, Emptiness, Emptiness of Emptiness) Remastered - Kikuo
Preview: video screenshot
Background: video screenshot
Lyrics and info: https://vocaloid.fandom.com/wiki/%E3%82%AB%E3%83%A9%E3%82%AB%E3%83%A9%E3%82%AB%E3%83%A9%E3%81%AE%E3%82%AB%E3%83%A9_(Kara_Kara_Kara_no_Kara)
Lyrics: https://vocaloidlyrics.fandom.com/wiki/%E3%82%AB%E3%83%A9%E3%82%AB%E3%83%A9%E3%82%AB%E3%83%A9%E3%81%AE%E3%82%AB%E3%83%A9_(Kara_Kara_Kara_no_Kara)